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https://issues.apache.org/jira/browse/CAMEL-12441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16439113#comment-16439113
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Claus Ibsen commented on CAMEL-12441:
-------------------------------------

Thanks I have reproduced the issue and have a fix. Mind that this problem is 
only on the first next call.

> MulticastProcessor doProcessParallel blocks indefinitly if exception occurs 
> in it.next()
> ----------------------------------------------------------------------------------------
>
>                 Key: CAMEL-12441
>                 URL: https://issues.apache.org/jira/browse/CAMEL-12441
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-core
>    Affects Versions: 2.20.3, 2.21.0
>         Environment: Windows 8, java 1.8.0_162, camel 2.21.0
>            Reporter: Bodor Maria Mihaela
>            Assignee: Claus Ibsen
>            Priority: Major
>             Fix For: 2.20.4, 2.21.1, 2.22.0
>
>
> After upgrading from camel 2.17.5 to 2.21.0 the following problem was 
> encountered:
> Context:
> A camel RouteBuilder with a split :
> {code:title=MyRouteBuilder.java|borderStyle=solid}
> public class MyRouteBuilder extends RouteBuilder {
>     @Override
>     public void configure() throws Exception {
>          from("direct:in")
>                  .split()
>                       .xtokenize("//someTocken", 'i', NAMESPACES)
>                       .aggregationStrategy(nw UseLatestAggregationStrategy())
>                       .stopOnException()
>                       .parallelAggregate()
>                       .parallelProcessing()
>                       
> .executorServiceRef("splitExecutorService").stopOnException()
>                       .streaming().stopOnException()
>                       .id("xml-splitter")
>                 .to("direct:out")
>                 .routeId(getClass().getSimpleName());
>     } 
> }
> {code}
> Problem encountered:
> A malformed xml arrives on this route. it.hasNext() returns true but 
> it.next() throws an exception. This causes an indefinite wait in 
> MulticastProcessor at line 374.
> Reason:
> A call to countDown on aggregationOnTheFlyDone is never performed and thus 
> the latch waits indefinitely.
> Possible solution:
> A call to aggregationOnTheFlyDone .countDown inside the catch corresponding 
> to the try surrounding the while.



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